Impact of the Use of Vegetable Oil on the Mechanical Failure of the Cellulosic Insulation of Continuously Transposed Conductors in Power Transformers

Natural esters have become of interest for the industry in recent years as dielectric liquids power transformers, and many studies are focused on their chemical properties influence degradation solid insulation due to aging. However, very little is known about impact evolution mechanical paper insulation, which acknowledged a considerable overall performance reliability during operating life transformers. This work effects thermal aging with vegetable oil some commercial components, commonly used such an insulated continuously transposed conductor (CTC) samples thermally upgraded crepe insulation. The changes characterized through degree polymerization tensile testing. Failure initiation propagation CTC analyzed macroscopically. results compared those obtained when using mineral oil, showing that use has protective effect over studied types